Shock-absorbing device.



C. PEARSON.

SHOCK ABSOR BING DEVICE.

APPLICATION FILED MAY 23. 1917.

Chris to uher Pe C.PEARSON. SHOCK ABSORBING DEVICE.

APPLICATION FILED MAY 23. 19!].

Patented Feb. 5, 1918f 2 SHEETS-SHEET 2.

v CHRISTOPHER PEARSON, 0F PHILADELPHIA, PENNSYLVANIA.

SHOQK-ABSORBING DEVICE.

Specification of Letters Patent.

Patented Feb. 5, 1918.

Application filed May 23, 1917. Serial No. 170,345.

T 0 all whom it may concern:

Be it known that I, CHRISTOPHER PEAR- SON, a subject of the King of Great Britain, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Shock-Absorbing Devices, of which the following is a specification.

One object of my invention is to provide a device of the above described character which can be applied to rifles and guns of various types and which will compensate for the shock caused by the discharge of the gun.

Another object is to provide adjustable cushioning means so that it can be adjusted to suit ammunition charges of various strengths.

A further object is to make my invention of simple construction and so that it can be manufactured and applied at a reasonable cost.

These objects, and other advantageous ends which will be described hereinafter, I

attain in the following manner, reference being had tothe accompanying drawings in which Figure 1 is a side elevation of the rear portion of a gun having my invention thereon.

Fig. 2 is a view on a larger scale than that shown in Fig. 1 and showing in vertical section my invention of the form illustrated in outside view in Fig. 1.

Fig. 3 is a section on the line 3-3 of Fig. 2.

, Fig. 4 is a view partly in vertical section showmg a modified form of my invention.

Fig. 5. is a transverse section taken on the line 55 of Fig. 4.

Fig. 6 is a side view partly in vertical section showing another form of my invention.

Fig. 7 is a transverse section taken on the line 77 of Fig. 6.

Referring to Figs. 1 to 3 inclusive of the drawing, 1 represents a rifle or other giun having a butt end 2. This end is provi ed with a jacket 3, preferably made of metal and has, slidable thereon, a shoulder engaging casing 4. The casing 4 has secured therein two plungers 5, preferably of tubular form, and each of these plungers supports a rod 6 which projects from its free end, and is screw-threaded as clearly illustrated in Fig. 2,

The plungers 5 slide within two sleeves 7 which are held between the end 8 of the jacket-3 and a plate 9 which is secured to the end of the butt 2. This plate 9 has holes 10 therein through which project the front ends of the rods 6.

Coiled springs 11 are interposed between the respective free ends of the plungers 5 and the flanged ends 12 of the sleeves 7. Rings or gaskets 13 preferably of rubber or other resilient material, are interposed between the inner surface of the plate 9 and thumb nuts 14 which are screwed on the ends of the rod 6. The gaskets 13 and nuts 14 are preferably mounted within cavities 15 formed in the butt 2 and these cavities preferably have openings 16 at opposite sides which lead to the outer surface of the jacket 3, so that said nuts can be manipulated by the fingers through the openings 16; thus by tightening or loosening the thumb nuts 14, the springs 11 and gaskets 13 will be more or less compressed, thereby varying their degree of tension so as to proportionately resist the rebound of the gun to suit the character of the ammunition charge therein.

The sleeves 7 are preferably provided with ports 17 and the rear end of the jacket 3 is preferably provided with a port 18 when the cushioning effect of air between the jacket and the casing 4 is not desired. By the provision of these ports, air will be permitted to escape first through the port 18, then through the ports 17, and through the passageways 19 which surround the rods 6 and are formed in the gaskets 13, plate 9,.and flanged ends 12.

In the operation of my invention, the casing 4 is placed against the shoulder in the usual manner of positioning a gun, and on the discharge of the gun, the body portion thereof will move relatively to the casing 4 and slide therein against the cushioning action of the springs 11 and gaskets 13. These springs and gaskets therefore absorb the shock, thus avoiding injury to the operator. 1

In the form of my invention shown in Figs. 4 and 5, a jacket 20 is secured on the a sleeve 25 fitted between the end 26 of the jacket 20, and a shoulder portion 27 formed by recessing the butt end 21. A resilient.

gasket 28 surrounds the rod 24 and is interposed between the inner end of the sleeve 25 and a thumb nut 29 which is screwed on the threaded end of the rod 24.

The gasket 28, nut 29 and free end of the a rod 24 project into a cavity 30 formedwithin the butt end 21 and this cavity has openings 31 through which the thumb nut can be manually turned. A coiled spring 32 is interposed between the inner end of the jacket 25 and free end of the plunger 23.

The axes of the several parts including the plunger 23, jacket 25 and rod 24 are positioned in such manner as will be best suited for the shape of the gun to which they are attached.

The plunger 23 is made hollow and pref- 7 erably has a port 33 which communicates with the chamber 34 between the end 26 of the jacket and the inner end surface of the shoulder-engaging casing 22. The forward end of the plunger 23 also preferably has a port 35 which communicates with the interior of the sleeve 25 and these ports serve as passages to prevent cushioning of the air in the chamber 34 in case it is desired to permit the spring 32 and gasket 29 to serve as the entire cushioning means.

In the form of my invention shown in Figs. 6 and 7, the butt end 36 of the gun is provided with a jacket 37 which slides within a shoulder engaging casing 38. The butt end 36 and jacket 37 are slotted longitudinally as shown at 39 to permit a transverse bar 40 on the casing 38 to extend therethrough thus coupling the casing 38 to the butt end 36, but permltting a predetermined sliding movement therebetween.

A plate spring 41 is secured to the inner end of the butt 36 and has curved free ends 42 which are designed to engage the inner surface 43 of the casing 38. The spring 41,

thus forms a resilient cushioning means between the;butt end 36 of the gun and the Having thus describedm invention, what I claim as new and desire to secure by Letters Patent is: j I

1. The combination of a gun, a plate secured to the butt end of the ing holes therein, said butt end having cavi ties extending inwardly from the plate and communicating with said holes, a jacket on the butt end of the gun and having an end plate spaced from said first plate,'sleeves extending between the first. plate and the jacket plate, a shoulder-engaging casing slidable on said jacket, plungers on said casing slidable within the sleeves, adjusting rods on said plungers extending through the holes in said first plate and into the cavities, nuts on said rods and positioned in said cavities, and bufling springs within said sleeves, substantially as described.

2. The combination of a gun, ashoulderengaging easing into which the butt end of the gun slidably fits, a sleeve in said butt end, said sleeve having an inner flanged end, a plunger secured to'the shoulder-engaging casing and slidable within said sleeve, a coiled spring interposed between the inner end of said plunger and the flanged end of the sleeve, a threaded rod extending from said plunger through the flanged end of the sleeve, a nut on said rod beyond the flanged end of the sleeve, said butt end of the gun having a cavity in which said nut is located, substantially as described.

3. The combinationof a gun, a shoulderengaging easing into which the butt end of the gun slidably fits, a sleeve in said but end,

said sleeve having an inner flanged end, a

plunger secured to the shoulder-engaging casing and slidable within said sleeve, a-

coiled spring interposed between the inner end of said plunger and the flanged end of the sleeve, a threaded rod extending from said plunger through the flanged end of the sleeve, a nut on said rod beyond the flanged end of the sleeve, said butt end of the gun having a cavity in which said-nut is located, and a resilient gasket surrounding said rod gun and havand interposed between the nut and the outer surface of the flanged end of the sleeve, substantially as described.

In testimony whereof I have signed my name to this specification-in the presence of two subscribing "witnesses.

Witnesses:

MARY A. INGLAR, CHAS. E. Po'rrs. 

